a It is usually the case that heating a solution containing an enzyme markedly d

Question

a It is usually the case that heating a solution containing an enzyme markedly decreases the enzyme's activity. What might be the reason for this P-0' Heating the solution will denature the enzyme. Increasing the temperature of a reaction will decrease the available free energy due to the increased entropy of the reaction. The ability of a substrate to bind to its enzyme will decrease as temperature increases. CH OH dihydroxyacetone glyceraldehyde 3-phosphate The elevated temperature will increase the activation energy of the catalyzed reaction. phosphate What type of enzyme will catalyze this reaction? hisderease n activity is frequently much reduced when the solution contains a high concentration of substrate. What might be the reasonor this? Oxidoreductase Transferase Hydrolase Lyase Substrate binding to the enzyme will help stabilize the enzyme structure. O The free energy of the reaction will increase in proportion to the concentration of substrate to make the reaction more favorable OIncreasing the substrate concentration will lower the activation energy of the catalyzed reaction. O Saturating the enzyme will increase the reaction rate Ligase

Explanation / Answer

This is a type of isomerisation reaction. So the enzyme isomerase will catalyse this reaction. So option (5).

(a) On heating, the enzyme gets denatured thereby decreasing its activity. Hence the rate of an enzyme catalysed reaction decreases with increase in temperature. So option (1).

(b) At high substrate concentration, almost all the enzyme molecules will be in the form of enzyme-substrate complex. The formation of this complex stabilises the enzyme structure and as a result, increase in temperature will not appreciably denature the enzyme. So option (1).

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